r_und_s – Chem­i­cal haz­ard codes

The r_und_s pack­age de­codes the ger­man ‘R- und
S-Sätze’, which are nu­mer­i­cally coded se­cu­rity ad­vice for
chem­i­cal sub­stances into plain text. This is, e.g., used to
com­pose se­cu­rity sheets or lab pro­to­cols and es­pe­cially use­ful for
stu­dents of chem­istry.

There are four pack­ages, giv­ing texts in Ger­man, English, French
and Dutch.